If you have a Whole Foods near you (I think there is one in Oakville, Ontario) their own line of soaps are great. They are 8 oz for $6 so they are huge. Variety of scents: lavender, sandalwood, cucumber line, honey almond. Read the ingredients, some of them such as the lavender organic use only essential oils which is nice.
Also, Dollarama has Yardley Lavender bar soap. It is I think about 3 to 4 oz but it's a $1 and smells GREAT.
Online, you can look up Pre de Provence. Their soaps are big as well.
Muhle R41+Feather | Mike's Orange & Bay Rum, MWF, DR Harris Arlington, AOS Sandalwood